xref: /freebsd/usr.sbin/ppp/tun.c (revision 1ae349f52c53416e04f1d038a8210f1a9fa7db2c)

/*-
 * Copyright (c) 1997 Brian Somers <brian@Awfulhak.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	$Id: tun.c,v 1.5 1998/01/11 17:53:27 brian Exp $
 */

#include <sys/param.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <net/if.h>
#include <net/if_tun.h>

#include <stdio.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/errno.h>

#include "command.h"
#include "mbuf.h"
#include "log.h"
#include "hdlc.h"
#include "defs.h"
#include "loadalias.h"
#include "vars.h"
#include "tun.h"

void
tun_configure(int mtu, int speed)
{
  struct tuninfo info;

  info.type = 23;
  info.mtu = mtu;
  if (VarPrefMTU != 0 && VarPrefMTU < mtu)
    info.mtu = VarPrefMTU;
  info.baudrate = speed;
#ifdef __OpenBSD__
  info.flags = IFF_UP|IFF_POINTOPOINT;
#endif
  if (ioctl(tun_out, TUNSIFINFO, &info) < 0)
    LogPrintf(LogERROR, "tun_configure: ioctl(TUNSIFINFO): %s\n",
	      strerror(errno));
}